/**
 * Created by PanJiaChen on 16/11/18.
 */

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string}
 */
export function parseTime(time, cFormat) {
  if (arguments.length === 0) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string') && (/^[0-9]+$/.test(time))) {
      time = parseInt(time)
    }
    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value] }
    if (result.length > 0 && value < 10) {
      value = '0' + value
    }
    return value || 0
  })
  return time_str
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime(time, option) {
  if (('' + time).length === 10) {
    time = parseInt(time) * 1000
  } else {
    time = +time
  }
  const d = new Date(time)
  const now = Date.now()

  const diff = (now - d) / 1000

  if (diff < 30) {
    return '刚刚'
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + '分钟前'
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + '小时前'
  } else if (diff < 3600 * 24 * 2) {
    return '1天前'
  }
  if (option) {
    return parseTime(time, option)
  } else {
    return (
      d.getMonth() +
      1 +
      '月' +
      d.getDate() +
      '日' +
      d.getHours() +
      '时' +
      d.getMinutes() +
      '分'
    )
  }
}

/**
 * 描述
 * @author LXBsmile
 * @date 2019-11-06
 * @param {Object} router 路由对象
 * @param {String} path redirect path
 * @returns {any}
 */
export function goError(router, path) {
  router.push(path)
}

/**
 * 描述
 * @author LXBsmile
 * @date 2019-10-18
 * @param {Date, String, Number} date 需要处理的日期
 * @param {Number} day 加减天数(负为减)
 * @returns {String} 时间字符串
 */
export function calcDate(date, day) {
  const time = new Date(date).getTime()
  const diff = day * 24 * 60 * 60 * 1000
  const r = time + diff
  return new Date(r)
}

/**
 * 计算月份
 * @author LXBsmile
 * @date 2019-11-28
 * @param {String, Date, Number} t 时间基数
 * @param {Number} n 加减月份（负数为减）
 * @returns {Date}
 */
export function calcDateByMonth(t, n) {
  const time = new Date(t)
  const m = time.getMonth()
  time.setMonth(m + n)
  return time
}

/**
 * 获取上一月的时间
 * exp：'2019-1' -> '2018-12'
 * @author LXBsmile
 * @date 2019-11-28
 * @param {Date, String, Number} t 时间
 * @returns {String}
 */
export function getLastMonth(t) {
  return parseTime(calcDateByMonth(t, -1), '{y}-{m}')
}

/**
 * 描述
 * @author LXBsmile
 * @date 2019-10-18
 * @param {Date, String, Number} start 开始日期
 * @param {Date, String, Number} end 结束日期
 * @returns {Number} 相差天数
 */
export function diffDate(start, end) {
  const s = new Date(start).getTime()
  const e = new Date(end).getTime()
  const d = e - s
  return (d / (1000 * 60 * 60 * 24))
}

/**
 * 描述
 * @author LXBsmile
 * @date 2019-10-21
 * @param {String, Number, Date} t1
 * @param {String, Number, Date} t2
 * @returns {Number} t1 > t2 : > 0; t1 < t2 : < 0; t1 == t2 : 0;
 */
export function compareTime(t1, t2) {
  const time1 = new Date(t1).getTime()
  const time2 = new Date(t2).getTime()
  return time1 - time2
}

/**
 * 获取月份的天数
 * @author LXBsmile
 * @date 2019-11-19
 * @param {Date, String, Number} t1 可以实例化时间对象的数据
 * @returns {Number} 月份的天数
 */
export function getMonthDay(t1) {
  const t = new Date(t1)
  const d = new Date(t.getFullYear(), t.getMonth() + 1, 0)
  return d.getDate()
}

/**
 * 描述
 * @author LXBsmile
 * @date 2019-10-21
 * @param {String, Number, Date} date
 * @returns {Date}
 */
export function getLastDayOfMonth(date) {
  const d = new Date(date)
  const m = d.getMonth()
  d.setMonth(m + 1)
  d.setDate(0)
  return d
}

/**
 * 把数字转换成万
 * @author LXBsmile
 * @date 2019-11-19
 * @param {Number} v 需要转换的数值
 * @returns {Number} 转换后的数值
 */
export function toWanKwH(v) {
  if (!v) return null
  const a = (v / 10000).toFixed(2)
  return parseFloat(a)
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function getQueryObject(url) {
  url = url == null ? window.location.href : url
  const search = url.substring(url.lastIndexOf('?') + 1)
  const obj = {}
  const reg = /([^?&=]+)=([^?&=]*)/g
  search.replace(reg, (rs, $1, $2) => {
    const name = decodeURIComponent($1)
    let val = decodeURIComponent($2)
    val = String(val)
    obj[name] = val
    return rs
  })
  return obj
}

/**
 * @param {string} input value
 * @returns {number} output value
 */
export function byteLength(str) {
  // returns the byte length of an utf8 string
  let s = str.length
  for (var i = str.length - 1; i >= 0; i--) {
    const code = str.charCodeAt(i)
    if (code > 0x7f && code <= 0x7ff) s++
    else if (code > 0x7ff && code <= 0xffff) s += 2
    if (code >= 0xDC00 && code <= 0xDFFF) i--
  }
  return s
}

/**
 * @param {Array} actual
 * @returns {Array}
 */
export function cleanArray(actual) {
  const newArray = []
  for (let i = 0; i < actual.length; i++) {
    if (actual[i]) {
      newArray.push(actual[i])
    }
  }
  return newArray
}

/**
 * @param {Object} json
 * @returns {Array}
 */
export function param(json) {
  if (!json) return ''
  return cleanArray(
    Object.keys(json).map(key => {
      if (json[key] === undefined) return ''
      return encodeURIComponent(key) + '=' + encodeURIComponent(json[key])
    })
  ).join('&')
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj(url) {
  const search = url.split('?')[1]
  if (!search) {
    return {}
  }
  return JSON.parse(
    '{"' +
    decodeURIComponent(search)
      .replace(/"/g, '\\"')
      .replace(/&/g, '","')
      .replace(/=/g, '":"')
      .replace(/\+/g, ' ') +
    '"}'
  )
}

/**
 * @param {string} val
 * @returns {string}
 */
export function html2Text(val) {
  const div = document.createElement('div')
  div.innerHTML = val
  return div.textContent || div.innerText
}

/**
 * Merges two objects, giving the last one precedence
 * @param {Object} target
 * @param {(Object|Array)} source
 * @returns {Object}
 */
export function objectMerge(target, source) {
  if (typeof target !== 'object') {
    target = {}
  }
  if (Array.isArray(source)) {
    return source.slice()
  }
  Object.keys(source).forEach(property => {
    const sourceProperty = source[property]
    if (typeof sourceProperty === 'object') {
      target[property] = objectMerge(target[property], sourceProperty)
    } else {
      target[property] = sourceProperty
    }
  })
  return target
}

/**
 * @param {HTMLElement} element
 * @param {string} className
 */
export function toggleClass(element, className) {
  if (!element || !className) {
    return
  }
  let classString = element.className
  const nameIndex = classString.indexOf(className)
  if (nameIndex === -1) {
    classString += '' + className
  } else {
    classString =
      classString.substr(0, nameIndex) +
      classString.substr(nameIndex + className.length)
  }
  element.className = classString
}

/**
 * @param {string} type
 * @returns {Date}
 */
export function getTime(type) {
  if (type === 'start') {
    return new Date().getTime() - 3600 * 1000 * 24 * 90
  } else {
    return new Date(new Date().toDateString())
  }
}

/**
 * @param {Function} func
 * @param {number} wait
 * @param {boolean} immediate
 * @return {*}
 */
export function debounce(func, wait, immediate) {
  let timeout, args, context, timestamp, result

  const later = function() {
    // 据上一次触发时间间隔
    const last = +new Date() - timestamp

    // 上次被包装函数被调用时间间隔 last 小于设定时间间隔 wait
    if (last < wait && last > 0) {
      timeout = setTimeout(later, wait - last)
    } else {
      timeout = null
      // 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
      if (!immediate) {
        result = func.apply(context, args)
        if (!timeout) context = args = null
      }
    }
  }

  return function(...args) {
    context = this
    timestamp = +new Date()
    const callNow = immediate && !timeout
    // 如果延时不存在，重新设定延时
    if (!timeout) timeout = setTimeout(later, wait)
    if (callNow) {
      result = func.apply(context, args)
      context = args = null
    }

    return result
  }
}

/**
 * This is just a simple version of deep copy
 * Has a lot of edge cases bug
 * If you want to use a perfect deep copy, use lodash's _.cloneDeep
 * @param {Object} source
 * @returns {Object}
 */
export function deepClone(source) {
  if (!source && typeof source !== 'object') {
    throw new Error('error arguments', 'deepClone')
  }
  const targetObj = source.constructor === Array ? [] : {}
  Object.keys(source).forEach(keys => {
    if (source[keys] && typeof source[keys] === 'object') {
      targetObj[keys] = deepClone(source[keys])
    } else {
      targetObj[keys] = source[keys]
    }
  })
  return targetObj
}

/**
 * @param {Array} arr
 * @returns {Array}
 */
export function uniqueArr(arr) {
  return Array.from(new Set(arr))
}

/**
 * @returns {string}
 */
export function createUniqueString() {
  const timestamp = +new Date() + ''
  const randomNum = parseInt((1 + Math.random()) * 65536) + ''
  return (+(randomNum + timestamp)).toString(32)
}

/**
 * Check if an element has a class
 * @param {HTMLElement} elm
 * @param {string} cls
 * @returns {boolean}
 */
export function hasClass(ele, cls) {
  return !!ele.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'))
}

/**
 * Add class to element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function addClass(ele, cls) {
  if (!hasClass(ele, cls)) ele.className += ' ' + cls
}

/**
 * Remove class from element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function removeClass(ele, cls) {
  if (hasClass(ele, cls)) {
    const reg = new RegExp('(\\s|^)' + cls + '(\\s|$)')
    ele.className = ele.className.replace(reg, ' ')
  }
}

/**
 * 计算表格的行数
 * @author LXBsmile
 * @date 2019-12-13
 * @param {Number} table的高度
 * @returns {Number}
 */
export function calcPageNum(h) {
  return Math.max(Math.round((h - 44) / 40), 10)
}

/**
 * 获取dom的内容高度(不包含border, padding);
 * @author LXBsmile
 * @date 2019-12-17
 * @param {HTMLElement} dom元素
 * @returns {nunber}
 */
export function getElContentHeight(el) {
  const ah = el.clientHeight
  const s = document.defaultView.getComputedStyle(el, null)
  const b = parseInt(s.borderWidth) || 0
  const pt = parseInt(s.paddingTop) || 0
  const pb = parseInt(s.paddingBottom) || 0
  return ah - b * 2 - pt - pb
}

/**
 * 下载二进制文件
 * @author LXBsmile
 * @date 2020-01-10
 * @param {String} 二进制流数据
 * @param {String} filename 文件名
 * @returns {any}
 */
export function downloadFile(b, filename) {
  const
    url = window.URL.createObjectURL(b)
  const a = document.createElement('a')
  a.href = url
  a.download = filename
  a.click()
  a.remove()
  window.URL.revokeObjectURL(url)
}

/**
 * 随机生成字符串
 * @author LXBsmile
 * @date 2020-01-08
 * @param {Number} length 生成字符串的长度
 * @returns {String}
 */
export function makeId(length) {
  let result = ''
  const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
  const charactersLength = characters.length
  for (let i = 0; i < length; i++) {
    result += characters.charAt(Math.floor(Math.random() * charactersLength))
  }
  return result
}
